These values are used to size the data files and the index in the database. The size is expressed in Mega-bytes.
These values are only interesting from the point of view of folder creation, and they are generally entered at the end of the definition of the folder parameters, just before the actual folder creation. In fact, to have available a correct estimate for the value, it is important to have previously sized the database tables by means of the sizing values ( Tables tab), and to have more importantly defined the table structure of the database by means of the activity codes (Options, Screens, Specifics).